Related Manuals for Bosch Rexroth M4-12
Summary of Contents for Bosch Rexroth M4-12
- Page 1 Load sensing control block M4-12 Basic document Repair manual Replaces: 10.2014 RE 64276-01-R/10.2017 English...
- Page 2 © Bosch Rexroth AG 2017. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. The data specified within only serves to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information.
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Page 3: Table Of Contents
Screw connection on the control block segment Fixing the control block in place Testing and re-commissioning Fault finding Accessories and spare parts Accessories and spare parts on the Internet Contact partners for accessories and spare parts RE 64276-01-R/10.2017, M4-12, Bosch Rexroth AG... -
Page 4: About This Manual
Related documents for the assembly and repair can be found in Table 21 on page 25 and can be obtained where necessary via www.boschrexroth.com/mobile-hydraulics-catalog Documents relating to the general circuit diagram of the machine are available from the vehicle manufacturer. Bosch Rexroth AG, M4-12, RE 64276-01-R/10.2017... -
Page 5: Display Of Information
Identifies a dangerous situation that may result in minor to CAUTion moderate injuries if it is not avoided. NOTE Property damage: The product or the environment may be damaged. RE 64276-01-R/10.2017, M4-12, Bosch Rexroth AG... -
Page 6: Symbols
Proportional pressure relief 1.3.4 Abbreviations This manual uses the following abbreviations: Table 5: Abbreviations Abbreviation Meaning Inlet Plate Pressure Relief Valve End Plate individual Pressure Compensator Fixed Displacement Pump Load Sensing Shut-Off Valve Variable Pump Bosch Rexroth AG, M4-12, RE 64276-01-R/10.2017... -
Page 7: Safety Instructions
• Specifically, fully understanding the relationships with regard to the installed safety devices • Understanding how hydraulic components work and are put together Bosch Rexroth offers training support for specialist fields. An overview of the training contents can be found on the Internet at: http://www.boschrexroth.com/training. -
Page 8: Product-Specific Safety Instructions
Risk of death or injury from electric shock or risk of property damage! ▶ Always set up the relevant part of the machine so that it is deenergized before you install the product or when connecting and disconnecting connectors. ▶ Secure the machine against being re-energized. Bosch Rexroth AG, M4-12, RE 64276-01-R/10.2017... - Page 9 Always connect the ground connection of the control block to the corresponding ground system in your installation. ▶ Only ever use a power supply unit with safe separation. Always take into account your country-specific specifications. RE 64276-01-R/10.2017, M4-12, Bosch Rexroth AG...
- Page 10 ▶ Wear your personal protective equipment (e.g., safety goggles, safety gloves, suitable working clothes, safety shoes). ▶ Consult a doctor immediately if hydraulic fluid gets in your eyes or bloodstream, or is swallowed. Bosch Rexroth AG, M4-12, RE 64276-01-R/10.2017...
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Page 11: Personal Protective Equipment
Observe the safety regulations and provisions in your country. All pieces of personal protective equipment must be intact. Bosch Rexroth recommends that personal protective equipment for users of the product comprises: • Heat-resistant protective clothing, e.g. safety gloves when working on the control block •... -
Page 12: General Instructions On Damage To Property And The Product
• Protective braces with hard rubber must be used. Sealing and flange surfaces must not be damaged. Tools required • Oil-soaked cleaning cloth • Sharpening stone • Mechanics' tool • Torque wrench • Rexroth repair case – Assembly-disassembly brushes – Special socket wrench – Tool Bosch Rexroth AG, M4-12, RE 64276-01-R/10.2017... - Page 13 Before installation, remove all fluids from the control block to prevent mixing with the hydraulic fluid that is used in the machine. ▶ Any mixing of hydraulic fluids from different manufacturers or different types from the same manufacturer is generally not permitted. RE 64276-01-R/10.2017, M4-12, Bosch Rexroth AG...
- Page 14 Hydraulic fluid can escape if leaks occur. ▶ Take appropriate steps to protect the control block from chemical or corrosive environmental conditions. Bosch Rexroth AG, M4-12, RE 64276-01-R/10.2017...
- Page 15 Nearby products can get damaged. Components which heat up (e.g., solenoids) can cause damage to nearby products if they are too close during installation. ▶ When installing the control block, check the distances to nearby products to ensure that they are not damaged. RE 64276-01-R/10.2017, M4-12, Bosch Rexroth AG...
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Page 16: Product Description
4.2 Connection designation Table 6: Connections Designation Port for Consumer Consumer LS signal Tank or return Pump Tank or pilot oil return Pilot oil supply Measuring port or external LS signal Tension rod bolt hole Bosch Rexroth AG, M4-12, RE 64276-01-R/10.2017... -
Page 17: Flange Interface
• The end plate closes off the control block. 4.4.1 inlet plate Table 7: internal functions item Designation Primary pressure relief valve Pilot oil supply cartridge Pressure compensator Fig. 2: inlet plate for fixed displacement pump RE 64276-01-R/10.2017, M4-12, Bosch Rexroth AG... -
Page 18: Directional Valves M4-12 - General
LS pressure relief valve hole optional LS port optional LS port Table 9: internal functions item Designation Shuttle valve Pressure compensator Y LS port X pilot oil port X pilot oil supply Fig. 4: Directional valve Bosch Rexroth AG, M4-12, RE 64276-01-R/10.2017... -
Page 19: Directional Valves M4-12 With Purely Mechanical Actuation
Cover, side A Cover, side A, with locking unit Secondary pressure relief valve, not adjustable, or plug Secondary pressure relief valve, adjustable Cover for LS components Cover, side A, with spring centering and stroke limitation RE 64276-01-R/10.2017, M4-12, Bosch Rexroth AG... -
Page 20: Directional Valves M4-12 With Hydraulic Actuation
Designation Cover, side B, with adjustable stroke limitation Cover, side A, with adjustable stroke limitation Secondary pressure relief valve or plug Plate for electro-proportional pressure relief Unloading valve Plate for switchable directional valves Bosch Rexroth AG, M4-12, RE 64276-01-R/10.2017... -
Page 21: Directional Valves M4-12 With Electrohydraulic Actuation
Cover, side B, with adjustable stroke limitation Cover, side A, with adjustable stroke limitation Secondary pressure relief valve or plug Plate for electro-proportional pressure relief Unloading valve Plate for switchable directional valves Spool position sensor RE 64276-01-R/10.2017, M4-12, Bosch Rexroth AG... -
Page 22: Directional Valves M4-12 With On-Board Electronics
Proportional pressure relief valve type KBPS Table 17: internal functions item Designation Cover, side B, with adjustable stroke limitation Cover, side A, for EPM2 or CPM Secondary pressure relief valve or plug Plate for electro-proportional pressure relief Unloading valve Bosch Rexroth AG, M4-12, RE 64276-01-R/10.2017... -
Page 23: Directional Valves M4-12 With Servohydraulic Actuation
Designation Cover, side A, for servo adjusting unit Cover, side B, with adjustable stroke limitation Secondary pressure relief valve, not adjustable, or plug 4.4.8 End plate Table 20: External connections item Designation Measuring port RE 64276-01-R/10.2017, M4-12, Bosch Rexroth AG... -
Page 24: Control Block Versions
Fig. 10: Electrohydraulic actuation with on-board electronics Control blocks in the M4-12 series have a modular structure. They can be combined to provide the perfect solution for the application at hand. The pictures shown are example configurations. Bosch Rexroth AG, M4-12, RE 64276-01-R/10.2017... -
Page 25: General Instructions For Assembly
Screw the screw connection in clockwise. Tighten the screw connection with a torque wrench in accordance with the manufacturer’s instructions. Fig. 11: inlet plate Fig. 12: inlet plate Fig. 13: Directional valve RE 64276-01-R/10.2017, M4-12, Bosch Rexroth AG... -
Page 26: Fixing The Control Block In Place
Table 22: Tightening torques Screw Tightening torque Minimum screw-in Through-hole diameter depth of the thread ±2 +0.2 M10 (8.8) 15 mm M10 (10.9) ±3 15 mm +0.2 Fig. 14: Fixing the control block in place Bosch Rexroth AG, M4-12, RE 64276-01-R/10.2017... -
Page 27: Testing And Re-Commissioning
Follow the instructions in the corresponding instruction manual. See Table 1 “Required and supplementary documentation”, on page 4. ▶ In the event of malfunctions, see the section 7 “Fault finding” on page 28. RE 64276-01-R/10.2017, M4-12, Bosch Rexroth AG... -
Page 28: Fault Finding
Ensure that the oil supply is connected and working correctly Dirt or foreign particles in the control Clean the insides of the control block segments block segment Check that the oil meets the specified oil cleanliness Bosch Rexroth AG, M4-12, RE 64276-01-R/10.2017... -
Page 29: Accessories And Spare Parts
8.2 Contact partners for accessories and spare parts Accessories and spare parts are available: • From the vehicle manufacturer (specialist dealer) • From your Bosch Rexroth specialist dealer Rexroth sales partners can be found on the Internet at www.boschrexroth.com/addresses For questions relating to repair and spare parts, contact your responsible Bosch Rexroth Service team. - Page 30 30/32 Accessories and spare parts Bosch Rexroth AG, M4-12, RE 64276-01-R/10.2017...
- Page 31 Accessories and spare parts 31/32 RE 64276-01-R/10.2017, M4-12, Bosch Rexroth AG...
- Page 32 Bosch Rexroth AG Zum Eisengießer 1 97816 Lohr am Main Germany Tel. +49 9352 18-0 info.ma@boschrexroth.de www.boschrexroth.com Your local contact can be found at: www.boschrexroth.com/addresses Subject to change Printed in Germany RE 64276-01-R/10.2017...